That is very interesting. For anyone who might care they have done AMAs in the past.
There might more, but it is hard to tell with the poor search implementation on reddit.com.
Seems that their original stance on IMAP was and I quote "we’ve made the decision and we’re sticking to it" [1], while a year later this was changed to "... we’ll support IMAP for Outlook sometime down the line" [2].